D defs.my
Entry 5 senses Webster, 1913

Maintain

/mān-tān'/ · Main·tain · IPA /meɪnˈteɪn/
01 v. t. To hold or keep in any particular state or condition; to support; to sustain; to uphold; to keep up; not to suffer to fail or decline; as, …
imp. & p. p. Maintained; p. pr. & vb. n. Maintaining
  1. 1.
    To hold or keep in any particular state or condition; to support; to sustain; to uphold; to keep up; not to suffer to fail or decline; as, to maintain a certain degree of heat in a furnace; to maintain a fence or a railroad; to maintain the digestive process or powers of the stomach; to maintain the fertility of soil; to maintain present reputation.
  2. 2.
    To keep possession of; to hold and defend; not to surrender or relinquish.
    “God values . . . every one as he maintains his post.” — Grew.
  3. 3.
    To continue; not to suffer to cease or fail.
    Maintain talk with the duke.” Shak.
  4. 4.
    To bear the expense of; to support; to keep up; to supply with what is needed.
    “Glad, by his labor, to maintain his life.” — Stirling.
    “What maintains one vice would bring up two children.” — Franklin.
  5. 5.
    To affirm; to support or defend by argument.
    “It is hard to maintain the truth, but much harder to be maintained by it.” South.
Syn. To assert; vindicate; allege. See Assert.